<template>
  <el-container class="home-container">
    <!-- 头部 -->
    
    <el-header>
      <div>
        <img src="../assets/heima.png" alt="">
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button></el-header>
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-button" @click="toggleCollapase">|||</div>
        <!-- 侧边栏菜单区域 -->
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409EFF" unique-opened
          :collapse="isCollapse"
          :collapse-transition="false"
          :router="true"
          :default-active="activePath">
          <!-- 一级菜单 -->
          <el-submenu :index="item.id + ''" v-for="item in menuList" :key="item.id">
            <!-- 一级菜单模板区域 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconObj[item.id]"></i>
              <!-- 文本 -->
              <span>{{item.authName}}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item :index="'/' + subitem.path + ''" v-for="subitem in item.children" 
            :key="subitem.id" @click="saveNavState('/' + subitem.path + '')">
              <template slot="title">
                <i class="el-icon-menu"></i>
                <!-- 文本 -->
                <span>{{subitem.authName}}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 内容 -->
      <el-main>
        <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>

</template>

<script>
export default {
  data() {
    return {
      // 左侧菜单数据
      menuList: [],
      iconObj:{
        '125':'iconfont icon-user',
        '103':'iconfont icon-tijikongjian',
        '101':'iconfont icon-shangpin',
        '102':'iconfont icon-danju',
        '145':'iconfont icon-baobiao'
      },
      isCollapse:false,
      activePath:''
    }
  },
  // 页面刚加载
  created() {
    // 在created阶段请求左侧菜单数据
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem("activePath")
  },
  methods:{
    logout(){
      window.sessionStorage.clear();
      this.$router.push("/login")
    },
    async getMenuList() {
      // 发送get请求获取左侧菜单数据 ,请求地址menus
      const { data: res } = await this.$http.get('menus')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)

      this.menuList = res.data
      console.log(res)
    },
    toggleCollapase(){
      this.isCollapse = !this.isCollapse;
    },
    saveNavState(activePath){
      window.sessionStorage.setItem('activePath',activePath)
       this.activePath = activePath;
    }
  }
  
}
</script>

<style lang="less" scope>
  .home-container{
    height: 100%;
  }
  .el-header{
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    padding-left: 0;
    align-items: center;
    color: #fff;
    font-size:20px;
    >div{
      display: flex;
      align-items: center;
    }
    >span{
      margin-left: 10px;
    }
  }
  .el-aside{
    background-color: #333744;
    .el-menu{
      border-right:none;
    }
  }
  .el-main{
    background-color: #eaedf1;
  }
  .iconfont {
    margin-left: 10px;
  }
  .toggle-button{
    background-color: #4A5064;
    font-size:10px;
    line-height: 24px;
    text-align: center;
    color:#fff;
    letter-spacing: 0.2em;
    cursor: pointer;
  }
</style>
